Mounting carriages for rock drills



March 29, 1955 0, s s 2,705,127

MOUNTING CARRIAGES FOR ROCK DRILLS Filed Sept. 11, 1951 1 I 62 5e R 46 F24 4O '2 o 42 3 I6 44) Y i I 28 4o 60 42 48 46 26 as OLIVER HNDECQI'ARSED BY ELIZABETH ujseumgekzcumlxf HIS ATTORNEY.

United States Patent 2,705,127 MOUNTING CARRIAGES FOR ROCK DRILLS OliverH. Sellars, deceased, late of Mendham, N. J., by Elizabeth H. Sellars,executrix, Mendham, N. J., assignor to Ingersoll-Rand Company, New York,N. Y., a corporation of New Jersey Application September 11, 1951,Serial No. 246,084 1 Claim. (Cl. 255-51) This invention relates to rockdrills and larly to mounting carriages therefor.

One object of this invention is to construct a mounting carriage forrock drills which may be easily moved from place to place.

Another object of the invention is to construct a mounting carriage forrock drills having a tool-supporting member which may be adjustedlongitudinally with respect to the mounting carriage.

A further object of the invention is to construct a mounting carriagefor rock drills having boom members so joined to the frame or thecarriage as to allow pivotal movement of the boom members with respectto the frame.

Still another object of the invention is to construct a mountingcarriage for rock drills having means for causing pivotal movement ofthe boom members with respect to the frame of the carriage.

Further objects will be in part obvious and in part pointed outhereinafter.

In the drawings in which similar reference numerals refer to similarparts,

Figure l is a side elevation, a mounting carriage for rock drillsconstructed in accordance with the practice of this invention,

Figure 2 is a plan view, partly in section, of a mounting carriage forrock drills constructed in accordance with the practice of thisinvention,

Figure 3 is a view taken along the line 3-3 in Figure 1 looking in thedirection of the arrows,

Figure 4 is a view taken along the line 44 in Figure 1 looking in thedirection of the arrows, and

Figure 5 is a view taken along the line 5-5 in Figure 4 looking in thedirection of the arrows.

The mounting carriage for the rock drill is comprised, in the main, of amobile, substantially U-shaped frame more particupartly in section,showing having a somewhat similar U-shaped tool supporting boom 12pivotally joined thereto. In the preferred form of the invention theframe 10 is formed by a pair of parallel side members 14 joined at anend by a crosspiece 16 having a pair of brackets 30 secured thereto. Forthe purpose of facilitating the transportation of the carriage fromplace to place, each side member 14 is provided with a wheel 18 and axle20 at the open end 22 of the frame 10. A third pivotal wheel 24 isprovided at the mid-portion of the crosspiece 16 in order that the framemay be guided, said wheel having a handle 26 fastened thereto by whichthe operator may propel and steer the carriage.

Secured to each of the side members 14 at the closed end 28 of the frame10 are a pair of brackets or stanchions 30 which support a tool-carryingboom 12. To this end each stanchion 30 is provided with a bore 34 in itsupper portion to receive the ends 36 of the base member 38 of the boom12. A pair of tubular side members 40 are secured to the base member 38in parallel relation to each other so that the distance between thetubular side members 40 of the boom 12 is less than the distance betweenthe side members 14 of the frame 10 in order that the boom 12 may passdownwardly through the frame 10. At their outer ends 42 the tubular sidemembers 40 receive a U-shaped tool-supporting member 44 whose sidemembers 46 are of such a diameter as to allow them to slidably fitwithin the tubular side members 40. Clamps 48 are provided at the endsof the tubular side members 40 by which the tool supporting member 44may be securely locked in place.

It Will be readily seen that the construction set out source of power.For purposes of support a pair of threaded rods 56 are pivotally oinedto brackets 58 secured to the side and support the weight of the boom.

The operation of the device is as follows. After the mounting carriagehas been placed in a desired position firmly anchored there, the boom 12is raised to its desired height by the operator by means of the handle54 attached to the worm 52 which drives the wheel 50 attached to thebase member 38 of the boom. Once the boom has been raised to the properposition, the nuts 64 are rotated on the threaded rods 56 until theyabut the guides 62 for the boom 12 and support the weight of the boom.Should it be desired to extend to cause the tubular side members theextensible portion 44 and rigidly position it.

It will be noted that by providing an extensible pivotable boom memberupon a U-shaped frame, the apthe wheels. latter provision is extremelyimportant as it allows the carriage to be used for drilling holes at thebase of a rock face or wall.

I claim:

A carriage mounting for rock drills comprising a U-shaped frame,supporting wheels at the open ends of the frame, and a centrally locatedwheel at the closed end of the frame, a pair of vertical brackets at theclosed end of the frame, a U-shaped boom member pivotally mounted onsaid brackets at its closed end, the legs of said boom'member beingadapted to swing between the legs of the said U-shaped frame, a secondU-shaped boom member having legs telescoping within the legs of thefirst said U-shaped boom justably clamped thereon, U-shaped boom ingrods mounted on the U-shaped frame and extending

